I need @ 100 Windows 7 x64 mini PCs. I cannot find a way to disable Secure Boot in the UEFI bios.

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In your bios under security if you cannot select Secure Boot [Disabled] go to Boot next to security and change boot mode
select [Legacy] not UEFI then you should be able to disable Secure Boot then F10 and exit
this is done on a Sony Vaio laptop i would assume its the same on other machines